: I am planning on installing a washing amchine in the basement,: and need to add a drain (hot and cold water are already: in). There is an existing tee on the main stack, about : five feet away. Can I simply run a 2" PVC line to the tee?: Can I feed the washing machine drain hose directly into an : opening end of the 2" PVC? DO I need a trap?

The two inch pipe can run to the 2" pipe using a San-Tee fitting on the vertical. You will need a vent, and then a p-trap. The washer drain can go into the standpipe of the p-trap. Terry